Which pairing correctly describes the usual interaction between a major histocompatibility complex molecule and a T-cell subset?
Correct answer: C. MHC I with CD8-positive T cells
- A. MHC II with CD8-positive T cells
- B. MHC I with CD4-positive T cells
- C. MHC I with CD8-positive T cells
- D. MHC II with B lymphocytes
Explanation
MHC I molecules present intracellular antigens to CD8-positive cytotoxic T cells. MHC II molecules mainly present extracellular antigens to CD4-positive helper T cells, making the other pairings incorrect.
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Covers the structure, classification, growth and transmission of bacteria, viruses, fungi and other disease causing microorganisms in animals. It explains innate and acquired immunity, antibodies, antigens, vaccination, hypersensitivity and diagnostic methods, while distinguishing infectious agents from the immune responses they produce.
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